//
// Created by Asus on 2025/5/13.
//

#include <iostream>
#include <string>
#include <bits/ostream.tcc>
using namespace std;

int main(int argc, char *argv[]) {
    string s1 = "runoob";
    string s2 = "google";
    string s3;
    int len;

    s3 = s1;
    cout << "s3: " << s3 << endl;

    s3 = s1 + " " + s3;
    cout << "s3: " << s3 << endl;

    len = s3.length();
    std::cout << "len: " << len << std::endl;

}
